Air France =Air Trash

I booked an upgrade for legroom on the 15th April for a long haul flight. I paid using my credit card and when I received the sms notification 5 minutes I realised that I had misread the payment and paid pounds instead of rands. Literally 20 times the amount! I phoned Air France help desk immediately at about 20.00 and the agent(Michael) assured me that I would get a refund since it is not only within 24 hours but within the same day. I phoned back today the 16th April at 8 am and a different agent said that there was NO RECORD of that conversation and that I need to phone the London office because the fair came off in pounds not rands.I eventually reached that office at 16.30 pm today-still within 24 hours. They now say that they cannot assist because I didn't call on time e.g the same day. And yet I DID call on the same day! I told them that I booked in error and they are basically telling me it's tough luck. Now I have to involve my bank to cancel the transaction. Never have I come across a company that does not comply with it's own regulations, has no interest in assisting client, does not seem too bothered about reputational damage. I eventually got a hold of the nice chap and he told me that he HAS put the refund through and to sit tight for 3 to 10 days. Does this have to be so difficult?